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I have a Chrysler grand voyager 3,3 2001 that all of a sudden started to misfire. We manage to get home and in to the garage but it was getting worse all the time. I hook up the PC and got a misfire on cyl 2. I change all plugs and wires and also switched to another coil pack. When I starting it struggles heavely and smokes real black. The strange thing is that I don't get any codes? I've checked the coolant temp sensor, the MAP sensor and intake air temp sensor all seems fine. I get a high voltage from post O2 sensor that's the only not ok value I can find. But when the engine is cold I believe the sensors doesn't have any effect is that true? Any suggestions are appreciated. /peter

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  • 7 Answers

Did you check the fuel injectors could be a fouled one

Posted on Nov 21, 2013

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6ya6ya
  • 2 Answers

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justuscc
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SOURCE: No Start, No Spark, for Grand Caravan 3.8L

we get remans bad out of the box......... good luck

Posted on Sep 26, 2008

SOURCE: 1999 pontiac grand prix . will not run

If wiggling the wires cured the code, then one of the wires is broken inside the insulation. Pull on each wire one at a time. look for the colored insulation to stretch, this will be the broken wire. For the other car that wont rev up, this is a common when the catalytic concverter is plugged up. This will also cause MAF codes, and in turn, TRAC OFF light.
See http://www.greatautohelp.com

Posted on Oct 17, 2008

  • 247 Answers

SOURCE: Buick century misfire

it could be thermosat...i would also check EGR valve the are common to stick out and cause misfires

Posted on Dec 17, 2008

USfalcon
  • 175 Answers

SOURCE: 1998 Chevy s10 4 cylinder running rough

1- check there is spark come from spark wires
2- check the fire timing by looking for every wire in the right place
3- check there is injector signl
4- check for any vacuom leak
5- try to clean the MAF by brake and parts cleaner
6- try to reset all the code and see what will come after that

Posted on Mar 14, 2009

  • 112 Answers

SOURCE: engine misfire and some times does not start when cold

Replace the Oxygen sensor. All your trouble codes are downstream of the oxygen sensor, and are related to it.

Once you replace the oxygen sensor (replace with a BOSCH sensor!), remove the positive battery cable, step on your brakes for 10 seconds, then reattach the cable. This will clear the codes from your ECM (Electronic Control Module).

Posted on Mar 26, 2009

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